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參數(shù)資料
| 型號： | CY2278A |
| 廠商： | Cypress Semiconductor Corp. |
| 英文描述： | PentiumII Clock Synthesizer/Driver for Mobile PCs with Intel 82430TX and No SDRAM(帶英特爾82430TX和2個DIMM 或3個SO-DIMM 的應(yīng)用于移動PC機的奔騰II6x86, K6 時鐘合成器/驅(qū)動器) |
| 中文描述： | PentiumII時鐘合成器/與英特爾82430TX和無內(nèi)存（帶英特爾82430TX內(nèi)存和2個或3個SO - DIMM插槽的應(yīng)用于移動電腦機的奔騰II6x86，K6時鐘合成器便攜式電腦驅(qū)動器/驅(qū)動器） |
| 文件頁數(shù)： | 3/11頁 |
| 文件大小： | 153K |
| 代理商： | CY2278A |
CY2278A
3
Pin Summary
Name
Pins
Description
V
DDQ3
V
DDQ2
V
DDCPU
AV
DD
V
SS
XTALIN
[3]
XTALOUT
[3]
6, 14, 19, 22, 36
3.3V Digital voltage supply
48
IOAPIC Digital voltage supply, 2.5V
42
CPU Digital voltage supply, 2.5V or 3.3V
26
Analog voltage supply, 3.3V
3, 9, 16, 25, 31, 33, 39, 45
Ground
4
Reference crystal input
5
Reference crystal feedback
SEL2
30
CPU clock frequency select input, bit 2
SEL1
32
CPU clock frequency select input, bit 1
SEL0
34
CPU clock frequency select input, bit 0
PCI_RUN
27
Control input, stops all PCI clocks except PCICLK_F when driven LOW
USB_RUN
28
Control input, stops all USB/IR clocks when driven LOW
CPU_RUN
29
Control input, stops all CPU clocks except XCPUCLK_F when driven LOW
PWR_DWN
46
Power down input, shuts down device when driven LOW
XCPUCLK[0:2]
44, 43, 41
2.5V or 3.3V CPU clock outputs
XCPUCLK3_F
40
2.5V or 3.3V CPU clock output, free-running on CY2278A-1L only. This output
is not free-running on the -2L, -3L, -4L configurations.
CPUCLK[0:2]
38, 37, 35
3.3V CPU clock output
PCICLK[2:9]
10, 11, 12, 13, 15, 17, 18, 20
PCI clock outputs
PCICLK_F[0:1]
7, 8
PCI clock outputs, free-running on CY2278A-1L, -3L, -4L only. This output is
not free-running on the -2L configuration
CLK8MHZ
21
8-MHz Keyboard clock output
IOAPIC
47
IOAPIC clock output
REF[0:1]
2, 1
Reference clock outputs, 14.318 MHz. REF0 has high drive
USBCLK/IRCLK
23, 24
USB or IR clock outputs, 48 MHz
Note:
3.
For best accuracy, use a parallel-resonant crystal, C
LOAD
= 18 pF.
Function Table
SEL2
0
SEL1
0
SEL0
0
XTALIN
14.318 MHz
CPUCLK
75.0 MHz
PCICLK
37.5 MHz
REF
IOAPIC
USBCLK
IRCLK
48.0 MHz
CLK8MHZ
8.0 MHz
14.318 MHz
0
0
1
14.318 MHz
20.0 MHz
10.0 MHz
14.318 MHz
48.0 MHz
8.0 MHz
0
1
0
14.318 MHz
25 MHz
12.5 MHz
14.318 MHz
48.0 MHz
8.0 MHz
0
1
1
14.318 MHz
33.33 MHz
16.67 MHz
14.318 MHz
48.0 MHz
8.0 MHz
1
0
0
14.318 MHz
50.0 MHz
25.0 MHz
14.318 MHz
48.0 MHz
8.0 MHz
1
0
1
14.318 MHz
60.0 MHz
30.0 MHz
14.318 MHz
48.0 MHz
8.0 MHz
1
1
0
14.318 MHz
66.67 MHz
33.33 MHz
14.318 MHz
48.0 MHz
8.0 MHz
1
1
1
14.318 MHz
40.0 MHz
20.0 MHz
14.318 MHz
48.0 MHz
8.0 MHz
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| CY22800-082A | Universal Programmable Clock Generator (UPCG) |
| CY22800 | Universal Programmable Clock Generator (UPCG) |
| CY22800_07 | Universal Programmable Clock Generator (UPCG) |
| CY22800-001A | Universal Programmable Clock Generator (UPCG) |
| CY22800-002A | Universal Programmable Clock Generator (UPCG) |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| CY2278APAC-1L | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:CPU System Clock Generator |
| CY2278APC-1L | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:CPU System Clock Generator |
| CY2278APC-2L | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:CPU System Clock Generator |
| CY2278APC-3L | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:CPU System Clock Generator |
| CY2278APC-4L | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:CPU System Clock Generator |
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